GeoNames Forum

Hello,
I imported the following datas into a MySQL database:
allCountries.txt
alternateNames.txt
admin1Codes.txt
admin1CodesASCII.txt
admin2Codes.txt
featureCodes_en.txt
timeZones.txt
countryInfo.txt
continentCodes.txt

(I following this how-to: http://forum.geonames.org/gforum/posts/list/15/80.page#4570).

I need to utilise alla datas in a registration form (html and php) and I would like know how to do to have a hierarchy of this genre:
Continent -> Nation -> Regione -> District -> City
or
how to have an autocomplete box in jquery like http://jqueryui.com/demos/autocomplete/#remote-jsonp.

Thankyou very muche for your support.
I believe in this useful geoname project.

I only wish to know how it's relationated the DB in way to have the hierarchy which I described in the previous post.
Thanks.